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Beam Echoes in the CERN SPS

Longitudinal echo signals have been produced in the CERN SPS by exciting a proton beam at 120~GeV/c with two short RF pulses separated by a suitable time-delay. The aim of the experiments was to confirm the analytical predictions for beam echoes in the SPS and to probe the applicability of beam echo...

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Detalles Bibliográficos
Autores principales: Brüning, Oliver Sim, Linnecar, Trevor Paul R, Ruggiero, F, Scandale, Walter, Shaposhnikova, Elena, Stellfeld, D
Lenguaje:eng
Publicado: 1997
Materias:
Acceso en línea:http://cds.cern.ch/record/327308
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author Brüning, Oliver Sim
Linnecar, Trevor Paul R
Ruggiero, F
Scandale, Walter
Shaposhnikova, Elena
Stellfeld, D
author_facet Brüning, Oliver Sim
Linnecar, Trevor Paul R
Ruggiero, F
Scandale, Walter
Shaposhnikova, Elena
Stellfeld, D
author_sort Brüning, Oliver Sim
collection CERN
description Longitudinal echo signals have been produced in the CERN SPS by exciting a proton beam at 120~GeV/c with two short RF pulses separated by a suitable time-delay. The aim of the experiments was to confirm the analytical predictions for beam echoes in the SPS and to probe the applicability of beam echoes for a measurement of the energy distribution and diffusion coefficients in the accelerator. We summarise here the results obtained with bunched and un-bunched beams. For an un-bunched beam, the excitation frequencies are at different harmonics of the revolution frequency and result in an echo response at the difference frequency of the two RF kicks. For the case of a bunched beam, the RF kicks are adjusted to excite the quadrupole mode of the bunch motion and the beam echo response can also be observed as a quadrupole mode.
id cern-327308
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
record_format invenio
spelling cern-3273082023-05-05T12:57:30Zhttp://cds.cern.ch/record/327308engBrüning, Oliver SimLinnecar, Trevor Paul RRuggiero, FScandale, WalterShaposhnikova, ElenaStellfeld, DBeam Echoes in the CERN SPSAccelerators and Storage RingsLongitudinal echo signals have been produced in the CERN SPS by exciting a proton beam at 120~GeV/c with two short RF pulses separated by a suitable time-delay. The aim of the experiments was to confirm the analytical predictions for beam echoes in the SPS and to probe the applicability of beam echoes for a measurement of the energy distribution and diffusion coefficients in the accelerator. We summarise here the results obtained with bunched and un-bunched beams. For an un-bunched beam, the excitation frequencies are at different harmonics of the revolution frequency and result in an echo response at the difference frequency of the two RF kicks. For the case of a bunched beam, the RF kicks are adjusted to excite the quadrupole mode of the bunch motion and the beam echo response can also be observed as a quadrupole mode.CERN-SL-97-023-APoai:cds.cern.ch:3273081997-06-02
spellingShingle Accelerators and Storage Rings
Brüning, Oliver Sim
Linnecar, Trevor Paul R
Ruggiero, F
Scandale, Walter
Shaposhnikova, Elena
Stellfeld, D
Beam Echoes in the CERN SPS
title Beam Echoes in the CERN SPS
title_full Beam Echoes in the CERN SPS
title_fullStr Beam Echoes in the CERN SPS
title_full_unstemmed Beam Echoes in the CERN SPS
title_short Beam Echoes in the CERN SPS
title_sort beam echoes in the cern sps
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/327308
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AT ruggierof beamechoesinthecernsps
AT scandalewalter beamechoesinthecernsps
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